--- /dev/null
+/* Copyright (c) 2014-2016. The SimGrid Team. All rights reserved. */
+
+/* This program is free software; you can redistribute it and/or modify it
+ * under the terms of the license (GNU LGPL) which comes with this package. */
+
+#include "src/kernel/routing/AsClusterDragonfly.hpp"
+#include "src/surf/network_interface.hpp"
+#include "src/surf/xml/platf.hpp" // FIXME: move that back to the parsing area
+
+#include <boost/algorithm/string/split.hpp>
+#include <boost/algorithm/string/classification.hpp>
+
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_route_cluster_dragonfly, surf_route_cluster, "Dragonfly Routing part of surf");
+
+namespace simgrid {
+namespace routing {
+
+AsClusterDragonfly::AsClusterDragonfly(const char*name)
+ : AsCluster(name) {
+}
+
+AsClusterDragonfly::~AsClusterDragonfly() {
+ if(this->routers_ != nullptr){
+ for (unsigned int i=0; i<this->numGroups_*this->numChassisPerGroup_*this->numBladesPerChassis_;i++)
+ delete(routers_[i]);
+ xbt_free(routers_);
+ }
+}
+
+unsigned int *AsClusterDragonfly::rankId_to_coords(int rankId)
+{
+ //coords : group, chassis, blade, node
+ unsigned int *coords = (unsigned int *) malloc(4 * sizeof(unsigned int));
+ coords[0] = rankId/ (numChassisPerGroup_*numBladesPerChassis_*numNodesPerBlade_);
+ rankId=rankId%(numChassisPerGroup_*numBladesPerChassis_*numNodesPerBlade_);
+ coords[1] = rankId/ (numBladesPerChassis_*numNodesPerBlade_);
+ rankId=rankId%(numBladesPerChassis_*numNodesPerBlade_);
+ coords[2] = rankId/ numNodesPerBlade_;
+ coords[3]=rankId%numNodesPerBlade_;
+
+ return coords;
+}
+
+void AsClusterDragonfly::parse_specific_arguments(sg_platf_cluster_cbarg_t cluster) {
+ std::vector<std::string> parameters;
+ std::vector<std::string> tmp;
+ boost::split(parameters, cluster->topo_parameters, boost::is_any_of(";"));
+
+ // TODO : we have to check for zeros and negative numbers, or it might crash
+ if (parameters.size() != 4){
+ surf_parse_error("Dragonfly are defined by the number of groups, chassiss per groups, blades per chassis, nodes per blade");
+ }
+
+ // Blue network : number of groups, number of links between each group
+ boost::split(tmp, parameters[0], boost::is_any_of(","));
+ if(tmp.size() != 2) {
+ surf_parse_error("Dragonfly topologies are defined by 3 levels with 2 elements each, and one with one element");
+ }
+
+ this->numGroups_=xbt_str_parse_int(tmp[0].c_str(), "Invalid number of groups: %s");
+ this->numLinksBlue_=xbt_str_parse_int(tmp[1].c_str(), "Invalid number of links for the blue level: %s");
+
+ // Black network : number of chassiss/group, number of links between each router on the black network
+ boost::split(tmp, parameters[1], boost::is_any_of(","));
+ if(tmp.size() != 2) {
+ surf_parse_error("Dragonfly topologies are defined by 3 levels with 2 elements each, and one with one element");
+ }
+
+ this->numChassisPerGroup_=xbt_str_parse_int(tmp[0].c_str(), "Invalid number of groups: %s");
+ this->numLinksBlack_=xbt_str_parse_int(tmp[1].c_str(), "Invalid number of links for the black level: %s");
+
+
+ // Green network : number of blades/chassis, number of links between each router on the green network
+ boost::split(tmp, parameters[2], boost::is_any_of(","));
+ if(tmp.size() != 2) {
+ surf_parse_error("Dragonfly topologies are defined by 3 levels with 2 elements each, and one with one element");
+ }
+
+ this->numBladesPerChassis_=xbt_str_parse_int(tmp[0].c_str(), "Invalid number of groups: %s");
+ this->numLinksGreen_=xbt_str_parse_int(tmp[1].c_str(), "Invalid number of links for the green level: %s");
+
+
+ // The last part of topo_parameters should be the number of nodes per blade
+ this->numNodesPerBlade_ = xbt_str_parse_int(parameters[3].c_str(), "Last parameter is not the amount of nodes per blade: %s");
+ this->cluster_ = cluster;
+}
+
+/*
+* Generate the cluster once every node is created
+*/
+void AsClusterDragonfly::seal(){
+ if(this->numNodesPerBlade_ == 0) {
+ return;
+ }
+
+ this->generateRouters();
+ this->generateLinks();
+}
+
+DragonflyRouter::DragonflyRouter(int group, int chassis, int blade):group_(group),chassis_(chassis),blade_(blade){ }
+
+DragonflyRouter::~DragonflyRouter(){
+ if(this->myNodes_!=nullptr)
+ xbt_free(myNodes_);
+ if(this->greenLinks_!=nullptr)
+ xbt_free(greenLinks_);
+ if(this->blackLinks_!=nullptr)
+ xbt_free(blackLinks_);
+ if(this->blueLinks_!=nullptr)
+ xbt_free(blueLinks_);
+}
+
+
+void AsClusterDragonfly::generateRouters() {
+ this->routers_=static_cast<DragonflyRouter**>(xbt_malloc0(this->numGroups_*this->numChassisPerGroup_*this->numBladesPerChassis_*sizeof(DragonflyRouter*)));
+
+ for(unsigned int i=0;i<this->numGroups_;i++){
+ for(unsigned int j=0;j<this->numChassisPerGroup_;j++){
+ for(unsigned int k=0;k<this->numBladesPerChassis_;k++){
+ DragonflyRouter* router = new DragonflyRouter(i,j,k);
+ this->routers_[i*this->numChassisPerGroup_*this->numBladesPerChassis_+j*this->numBladesPerChassis_+k]=router;
+ }
+ }
+ }
+}
+
+void AsClusterDragonfly::createLink(char* id, int numlinks, Link** linkup, Link** linkdown){
+ *linkup=nullptr;
+ *linkdown=nullptr;
+ s_sg_platf_link_cbarg_t linkTemplate;
+ memset(&linkTemplate, 0, sizeof(linkTemplate));
+ linkTemplate.bandwidth = this->cluster_->bw * numlinks;
+ linkTemplate.latency = this->cluster_->lat;
+ linkTemplate.policy = this->cluster_->sharing_policy; // sthg to do with that ?
+ linkTemplate.id = id;
+ sg_platf_new_link(&linkTemplate);
+ XBT_DEBUG("Generating link %s", id);
+ Link* link;
+ std::string tmpID;
+ if (this->cluster_->sharing_policy == SURF_LINK_FULLDUPLEX) {
+ tmpID = std::string(linkTemplate.id) + "_UP";
+ link = Link::byName(tmpID.c_str());
+ *linkup = link; // check link?
+ tmpID = std::string(linkTemplate.id) + "_DOWN";
+ link = Link::byName(tmpID.c_str());
+ *linkdown = link; // check link ?
+ }
+ else {
+ link = Link::byName(linkTemplate.id);
+ *linkup = link;
+ *linkdown = link;
+ }
+
+ free((void*)linkTemplate.id);
+}
+
+
+void AsClusterDragonfly::generateLinks() {
+
+ static int uniqueId = 0;
+ char* id = nullptr;
+ Link* linkup;
+ Link *linkdown;
+
+ unsigned int numRouters = this->numGroups_*this->numChassisPerGroup_*this->numBladesPerChassis_;
+
+ if (this->cluster_->sharing_policy == SURF_LINK_FULLDUPLEX)
+ numLinksperLink_=2;
+
+ //Links from routers to their local nodes.
+ for(unsigned int i=0; i<numRouters;i++){
+ //allocate structures
+ this->routers_[i]->myNodes_=static_cast<Link**>(xbt_malloc0(numLinksperLink_*this->numNodesPerBlade_*sizeof(Link*)));
+ this->routers_[i]->greenLinks_=static_cast<Link**>(xbt_malloc0(this->numBladesPerChassis_*sizeof(Link*)));
+ this->routers_[i]->blackLinks_=static_cast<Link**>(xbt_malloc0(this->numChassisPerGroup_*sizeof(Link*)));
+
+ for(unsigned int j=0; j< numLinksperLink_*this->numNodesPerBlade_; j+=numLinksperLink_){
+ id = bprintf("local_link_from_router_%d_to_node_%d_%d", i, j/numLinksperLink_, uniqueId);
+ this->createLink(id, 1, &linkup, &linkdown);
+ if (this->cluster_->sharing_policy == SURF_LINK_FULLDUPLEX) {
+ this->routers_[i]->myNodes_[j] = linkup;
+ this->routers_[i]->myNodes_[j+1] = linkdown;
+ }
+ else {
+ this->routers_[i]->myNodes_[j] = linkup;
+ }
+ uniqueId++;
+ }
+ }
+
+ //Green links from routers to same chassis routers - alltoall
+ for(unsigned int i=0; i<this->numGroups_*this->numChassisPerGroup_;i++){
+ for(unsigned int j=0; j<this->numBladesPerChassis_;j++){
+ for(unsigned int k=j+1;k<this->numBladesPerChassis_;k++){
+ id = bprintf("green_link_in_chassis_%d_between_routers_%d_and_%d_%d", i%numChassisPerGroup_, j, k, uniqueId);
+ this->createLink(id, this->numLinksGreen_, &linkup, &linkdown);
+ this->routers_[i*numBladesPerChassis_+j]->greenLinks_[k] = linkup;
+ this->routers_[i*numBladesPerChassis_+k]->greenLinks_[j] = linkdown;
+ uniqueId++;
+ }
+ }
+ }
+
+ //Black links from routers to same group routers - alltoall
+ for(unsigned int i=0; i<this->numGroups_;i++){
+ for(unsigned int j=0; j<this->numChassisPerGroup_;j++){
+ for(unsigned int k=j+1;k<this->numChassisPerGroup_;k++){
+ for(unsigned int l=0;l<this->numBladesPerChassis_;l++){
+ id = bprintf("black_link_in_group_%d_between_chassis_%d_and_%d_blade_%d_%d", i, j, k,l, uniqueId);
+ this->createLink(id, this->numLinksBlack_,&linkup, &linkdown);
+ this->routers_[i*numBladesPerChassis_*numChassisPerGroup_+j*numBladesPerChassis_+l]->blackLinks_[k] = linkup;
+ this->routers_[i*numBladesPerChassis_*numChassisPerGroup_+k*numBladesPerChassis_+l]->blackLinks_[j] = linkdown;
+ uniqueId++;
+ }
+ }
+ }
+ }
+
+
+ //Blue links between groups - Not all routers involved, only one per group is linked to others. Let's say router n of each group is linked to group n.
+//FIXME: in reality blue links may be attached to several different routers
+ for(unsigned int i=0; i<this->numGroups_;i++){
+ for(unsigned int j=i+1; j<this->numGroups_;j++){
+ unsigned int routernumi=i*numBladesPerChassis_*numChassisPerGroup_+j;
+ unsigned int routernumj=j*numBladesPerChassis_*numChassisPerGroup_+i;
+ this->routers_[routernumi]->blueLinks_=static_cast<Link**>(xbt_malloc0(sizeof(Link*)));
+ this->routers_[routernumj]->blueLinks_=static_cast<Link**>(xbt_malloc0(sizeof(Link*)));
+ id = bprintf("blue_link_between_group_%d_and_%d_routers_%d_and_%d_%d", i, j, routernumi,routernumj, uniqueId);
+ this->createLink(id, this->numLinksBlue_, &linkup, &linkdown);
+ this->routers_[routernumi]->blueLinks_[0] = linkup;
+ this->routers_[routernumj]->blueLinks_[0] = linkdown;
+ uniqueId++;
+ }
+ }
+}
+
+void AsClusterDragonfly::getRouteAndLatency(NetCard * src, NetCard * dst, sg_platf_route_cbarg_t route, double *latency) {
+ //Minimal routing version.
+ // TODO : non-minimal random one, and adaptive ?
+
+ if (dst->isRouter() || src->isRouter())
+ return;
+
+ XBT_VERB("dragonfly_get_route_and_latency from '%s'[%d] to '%s'[%d]", src->name(), src->id(), dst->name(), dst->id());
+
+ if ((src->id() == dst->id()) && hasLoopback_) {
+ s_surf_parsing_link_up_down_t info = xbt_dynar_get_as(privateLinks_, src->id() * linkCountPerNode_, s_surf_parsing_link_up_down_t);
+
+ route->link_list->push_back(info.linkUp);
+ if (latency)
+ *latency += info.linkUp->getLatency();
+ return;
+ }
+
+ unsigned int *myCoords = rankId_to_coords(src->id());
+ unsigned int *targetCoords = rankId_to_coords(dst->id());
+ XBT_DEBUG("src : %u group, %u chassis, %u blade, %u node", myCoords[0], myCoords[1], myCoords[2], myCoords[3]);
+ XBT_DEBUG("dst : %u group, %u chassis, %u blade, %u node", targetCoords[0], targetCoords[1], targetCoords[2], targetCoords[3]);
+
+ DragonflyRouter* myRouter = routers_[myCoords[0]*(numChassisPerGroup_*numBladesPerChassis_)+myCoords[1] * numBladesPerChassis_+myCoords[2]];
+ DragonflyRouter* targetRouter = routers_[targetCoords[0]*(numChassisPerGroup_*numBladesPerChassis_)+targetCoords[1] *numBladesPerChassis_ +targetCoords[2]];
+ DragonflyRouter* currentRouter=myRouter;
+
+ //node->router local link
+ route->link_list->push_back(myRouter->myNodes_[myCoords[3]*numLinksperLink_]);
+ if(latency) {
+ *latency += myRouter->myNodes_[myCoords[3]*numLinksperLink_]->getLatency();
+ }
+
+ if (hasLimiter_) { // limiter for sender
+ s_surf_parsing_link_up_down_t info;
+ info = xbt_dynar_get_as(privateLinks_, src->id() * linkCountPerNode_ + hasLoopback_, s_surf_parsing_link_up_down_t);
+ route->link_list->push_back(info.linkUp);
+ }
+
+ if(targetRouter!=myRouter){
+
+ //are we on a different group ?
+ if(targetRouter->group_ != currentRouter->group_){
+ //go to the router of our group connected to this one.
+ if(currentRouter->blade_!=targetCoords[0]){
+ //go to the nth router in our chassis
+ route->link_list->push_back(currentRouter->greenLinks_[targetCoords[0]]);
+ if(latency) {
+ *latency += currentRouter->greenLinks_[targetCoords[0]]->getLatency();
+ }
+ currentRouter=routers_[myCoords[0]*(numChassisPerGroup_*numBladesPerChassis_)+myCoords[1] * numBladesPerChassis_+targetCoords[0]];
+ }
+
+ if(currentRouter->chassis_!=0){
+ //go to the first chassis of our group
+ route->link_list->push_back(currentRouter->blackLinks_[0]);
+ if(latency) {
+ *latency += currentRouter->blackLinks_[0]->getLatency();
+ }
+ currentRouter=routers_[myCoords[0]*(numChassisPerGroup_*numBladesPerChassis_)+targetCoords[0]];
+ }
+
+ //go to destination group - the only optical hop
+ route->link_list->push_back(currentRouter->blueLinks_[0]);
+ if(latency) {
+ *latency += currentRouter->blueLinks_[0]->getLatency();
+ }
+ currentRouter=routers_[targetCoords[0]*(numChassisPerGroup_*numBladesPerChassis_)+myCoords[0]];
+ }
+
+
+ //same group, but same blade ?
+ if(targetRouter->blade_ != currentRouter->blade_){
+ route->link_list->push_back(currentRouter->greenLinks_[targetCoords[2]]);
+ if(latency) {
+ *latency += currentRouter->greenLinks_[targetCoords[2]]->getLatency();
+ }
+ currentRouter=routers_[targetCoords[0]*(numChassisPerGroup_*numBladesPerChassis_)+targetCoords[2]];
+ }
+
+ //same blade, but same chassis ?
+ if(targetRouter->chassis_ != currentRouter->chassis_){
+ route->link_list->push_back(currentRouter->blackLinks_[targetCoords[1]]);
+ if(latency) {
+ *latency += currentRouter->blackLinks_[targetCoords[1]]->getLatency();
+ }
+ currentRouter=routers_[targetCoords[0]*(numChassisPerGroup_*numBladesPerChassis_)+targetCoords[1]*numBladesPerChassis_+targetCoords[2]];
+ }
+ }
+
+ if (hasLimiter_) { // limiter for receiver
+ s_surf_parsing_link_up_down_t info;
+ info = xbt_dynar_get_as(privateLinks_, dst->id() * linkCountPerNode_ + hasLoopback_, s_surf_parsing_link_up_down_t);
+ route->link_list->push_back(info.linkUp);
+ }
+
+ //router->node local link
+ route->link_list->push_back(targetRouter->myNodes_[targetCoords[3]*numLinksperLink_+numLinksperLink_-1]);
+ if(latency) {
+ *latency += targetRouter->myNodes_[targetCoords[3]*numLinksperLink_+numLinksperLink_-1]->getLatency();
+ }
+
+ xbt_free(myCoords);
+ xbt_free(targetCoords);
+
+
+}
+ }
+}
